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diff --git a/images/thumbs/hero.jpg b/images/thumbs/hero.jpg
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diff --git a/images/thumbs/time/251206.jpg b/images/thumbs/time/251206.jpg
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index 0000000..309a44c
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diff --git a/images/thumbs/time/260214.jpg b/images/thumbs/time/260214.jpg
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diff --git a/index.html b/index.html
index 16d9a5f..e46dcc1 100644
--- a/index.html
+++ b/index.html
@@ -95,7 +95,7 @@
       align-items: stretch;
       justify-content: center;
       padding: 0;
-      background: #d8cbc4;
+      background: #f7f7f7;
       overflow: hidden;
       margin-left: -215px;
       transition:
@@ -115,7 +115,7 @@
     .hero-spacer {
       height: 100vh;
       height: 100svh;
-      background: #d8cbc4;
+      background: #f7f7f7;
       transition: height 420ms cubic-bezier(.2, .8, .2, 1);
     }
 
@@ -128,7 +128,7 @@
       height: 100%;
       display: block;
       object-fit: contain;
-      background: #d8cbc4;
+      background: #f7f7f7;
       image-rendering: auto;
     }
 
@@ -743,7 +743,7 @@
 <body>
   <main class="shell">
     <header class="hero" data-aos="hero-cover" data-aos-duration="680" data-aos-once="true">
-      <img class="main-invitation" src="./images/hero.jpg" alt="김도아 돌잔치 초대장">
+      <img class="main-invitation" src="./images/thumbs/hero.jpg" alt="김도아 돌잔치 초대장" fetchpriority="high">
       <!-- <a class="scroll-cue" href="#intro">스크롤<span></span></a> -->
     </header>
     <div class="hero-spacer" aria-hidden="true"></div>
@@ -937,6 +937,18 @@
       img.src = DATA.images[img.dataset.img];
     });
 
+    const toThumbnailPath = (image) => {
+      if (image.startsWith("./images/")) {
+        return image.replace("./images/", "./images/thumbs/");
+      }
+
+      if (image.startsWith("/images/")) {
+        return image.replace("/images/", "/images/thumbs/");
+      }
+
+      return image;
+    };
+
     const openRouteLink = (event) => {
       const route = DATA.links[event.currentTarget.dataset.link];
       const isMobile = /Android|iPhone|iPad|iPod/i.test(navigator.userAgent);
@@ -1082,7 +1094,7 @@
     document.querySelector("#timeline").innerHTML = DATA.timeline.map(([date, text, image]) => `
       <article class="milestone">
         <div class="milestone-visual">
-          <img src="${image}" alt="">
+          <img src="${toThumbnailPath(image)}" data-full="${image}" alt="" loading="lazy" decoding="async">
         </div>
         <div class="milestone-copy">
           <time>${date}</time>
@@ -1104,7 +1116,7 @@
     galleryGridSlides.innerHTML = galleryGroups.map((group) => `
       <div class="swiper-slide">
         <div class="gallery-grid">
-          ${group.map((image) => `<img src="${image}" alt="">`).join("")}
+          ${group.map((image) => `<img src="${toThumbnailPath(image)}" data-full="${image}" alt="" loading="lazy" decoding="async">`).join("")}
         </div>
       </div>
     `).join("");
@@ -1155,7 +1167,7 @@
       };
 
       document.querySelectorAll(".milestone img, .gallery-grid img, .slider .swiper-slide img").forEach((image) => {
-        image.addEventListener("click", () => openLightbox(image.currentSrc || image.src, image.alt));
+        image.addEventListener("click", () => openLightbox(image.dataset.full || image.currentSrc || image.src, image.alt));
       });
 
       closeButton.addEventListener("click", closeLightbox);
@@ -1232,6 +1244,7 @@
       const heroSpacer = document.querySelector(".hero-spacer");
       let touchStartY = 0;
       let isDismissed = false;
+      let isRestoringHero = false;
 
       if (!hero) {
         return;
@@ -1242,8 +1255,28 @@
       hero.classList.remove("is-dismissed");
       heroSpacer?.classList.remove("is-collapsed");
 
+      const showHero = () => {
+        if (!isDismissed || isRestoringHero) {
+          return;
+        }
+
+        isRestoringHero = true;
+        isDismissed = false;
+        window.scrollTo({ top: 0, behavior: "auto" });
+        heroSpacer?.classList.remove("is-collapsed");
+        hero.classList.add("aos-init", "aos-animate");
+        hero.classList.remove("is-dismissed");
+
+        window.setTimeout(() => {
+          isRestoringHero = false;
+          if (window.AOS) {
+            AOS.refreshHard();
+          }
+        }, 460);
+      };
+
       const dismissHero = () => {
-        if (isDismissed) {
+        if (isDismissed || isRestoringHero) {
           return;
         }
 
@@ -1291,6 +1324,14 @@
         event.preventDefault();
         dismissHero();
       });
+
+      window.addEventListener("scroll", () => {
+        if (!isDismissed || window.scrollY > 1) {
+          return;
+        }
+
+        showHero();
+      }, { passive: true });
     };
 
     if (document.readyState === "complete") {